Effect of the hottest zirconium on the low tempera
2022-09-30- Detail
Effect of zirconium on the low temperature toughness of coarse grain heat affected zone of titanium bearing F40 ship plate steel
in recent years, the international market share of China's shipbuilding industry has increased rapidly, especially after the international financial crisis, China's international shipbuilding market share has increased instead of decreased. In recent years, the international market share of China's shipbuilding industry has risen rapidly, especially after the international financial crisis, China's international shipbuilding market share has increased rather than decreased. Weldability, especially high heat input weldability, has become a bottleneck restricting the development of domestic ship plates. Oxide metallurgy technology is applied to improve the welding performance of steel, that is, using small non-metallic inclusions in steel to induce the nucleation of intragranular acicular ferrite, so as to improve the performance of heataffectedzone (HAZ) under high heat input welding. Zirconium is a strong oxide forming element, and the oxide formed has a high melting point, which can improve heat input. Therefore, the overall trend of coke price is mainly stable, and the toughness of welding heat affected zone during welding
some scholars have carried out welding thermal simulation tests under different transformation cooling time t8/5 on gleeble3500 thermal simulation testing machine for F40 ship plate steel with 0.01% zirconium and without zirconium. The results show that the addition of trace zirconium can greatly improve the weldability of F40 steel containing titanium under high heat input. When t8/5 is increased to 100s, the impact energy at -60 ℃ can reach 238j. The advanced materials adopted by F4 steel C919 containing zirconium are mainly the third generation aluminum lithium alloy, carbon fiber composite and titanium alloy. It is found that with the increase of t8/5, the size and morphology of the original zirconium containing composite inclusions change, Compared with the original requirements, the number of zirconium titanium composite inclusions with a size of 1 ~ 3 m that are conducive to the induction of acicular ferrite nucleation is increased by 40 times, resulting in a non monotonic decrease in the impact toughness of coarse grain heat affected zone with the increase of t8/5
- ·Fort McKay First Nation’s youth connect with commu
- ·Mallorca coach signs contract extension - Today Ne
- ·Heart-breaking video shows Ukraine father farewell
- ·Portugal reopens cafe terraces and retail shops re
- ·Ontario science table says vaccine certificates co
- ·Wrens Week- Gladys does the dash while Porter rema
- ·Food for thought- Persimmons - the fruits of autum
- ·Australia must raise very low JobSeeker rate- OECD
LINK
Copyright © 2011 JIN SHI